Compaq 9G Owner's manual

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hp 9g

Graphing Calculator

Contents

Chapter 1 : General Operations ................................... 4

Power Supply .................................................................... 4

Turning on or off ........................................................................... 4

Battery replacement ...................................................................... 4

Auto power-off function ................................................................ 4

Reset operation ............................................................................. 4

Contrast Adjustment .......................................................... 4

Display Features................................................................ 5

Graph display............................................................................... 5

Calculation display........................................................................ 5

Chapter 2 : Before Starting a Calculation ...................... 6

Changing Modes............................................................... 6

Selecting an Item from a Menu........................................... 6

Key Labels......................................................................... 6

Using the 2nd and ALPHA keys .......................................... 7

Cursor .............................................................................. 7

Inserting and Deleting Characters....................................... 7

Recalling Previous Inputs and Results .................................. 8

Memory............................................................................ 8

Running memory........................................................................... 8

Standard memory variables.......................................................... 8

Storing an equation ...................................................................... 8

Array Variables............................................................................. 8

Order of Operations.......................................................... 9

Accuracy and Capacity .................................................... 10

Error Conditions .............................................................. 12

Chapter 3 : Basic Calculations .................................... 13

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Arithmetic Calculation...................................................... 13

Display Format................................................................ 13

Parentheses Calculations.................................................. 14

Percentage Calculations ................................................... 14

Repeat Calculations ......................................................... 14

Answer Function.............................................................. 14

Chapter 4 : Common Math Calculations...................... 15

Logarithm and Antilogarithm ........................................... 15

Fraction Calculation ......................................................... 15

Converting Angular Units................................................. 15

Trigonometric and Inverse Trigonometric functions............. 16

Hyperbolic and Inverse Hyperbolic functions ..................... 16

Coordinate Transformations ............................................. 16

Mathematical Functions ................................................... 16

Other Functions ( x

-1

, , , ,x

2

, x

3

,

^

).................... 17

Unit Conversion............................................................... 17

Physics Constants ............................................................ 18

Multi-statement functions ................................................. 19

Chapter 5 : Graphs .................................................... 19

Built-in Function Graphs................................................... 19

User-generated Graphs.................................................... 19

Graph

↔

Text Display and Clearing a Graph.................... 20

Zoom Function ................................................................ 20

Superimposing Graphs .................................................... 20

Trace Function ................................................................. 20

Scrolling Graphs.............................................................. 21

Plot and Line Function ...................................................... 21

Chapter 6 : Statistical Calculations.............................. 21

Single-Variable and Two-Variable Statistics....................... 21

Process Capability ........................................................... 22

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Correcting Statistical Data ................................................ 23

Probability Distribution (1-Var Data) ................................. 23

Regression Calculation..................................................... 24

Chapter 7 : BaseN Calculations .................................. 24

Negative Expressions....................................................... 25

Basic Arithmetic Operations for Bases............................... 25

Logical Operation............................................................ 25

Chapter 8 : Programming........................................... 25

Before Using the Program Area........................................ 26

Program Control Instructions ............................................ 26

Clear screen command.................................................................26

Input and output commands.........................................................26

Conditional branching..................................................................27

Jump commands ..........................................................................27

Mainroutine and Subroutine.........................................................27

Increment and decrement............................................................ 28

For loop ...................................................................................... 28

Sleep command .......................................................................... 28

Swap command .......................................................................... 28

Relational Operators........................................................ 29

Creating a New Program ................................................. 29

Executing a Program ....................................................... 29

Debugging a Program ..................................................... 30

Using the Graph Function in Programs.............................. 30

Display Result Command.................................................. 30

Deleting a Program ......................................................... 30

Program Examples .......................................................... 31

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Chapter 1 : General Operations

Power Supply

Turning on or off

To turn the calculator on, press [ ON ].

To turn the calculator off, press [ 2nd ] [ OFF ].

Battery replacement

The calculator is powered by two alkaline button batteries (GP76A or LR44).

When battery power becomes low, LOW BATTERY appears on the display.

Replace the batteries as soon as possible.

To replace the batteries:

1. Remove the battery compartment cover by sliding it in the direction of

the arrow.

2. Remove the old batteries.

3. Install new batteries, each with positive polarity facing outward.

4. Replace the battery compartment cover.

5. Press [ ON ] to turn the power on.

Auto power-off function

The calculator automatically turns off if it has not been used for 9–15

minutes. It can be reactivated by pressing [ ON ]. The display, memory,

and settings are retained while the calculator is off.

Reset operation

If the calculator is on but you get unexpected results, press [ MODE ] or

[

CL

/

ESC

]. If problems persist, press [ 2nd ] [ RESET ]. A message appears

asking you to confirm that you want to reset the calculator.

RESET : N Y

Press [ ] to move the cursor to Y and then press [ ]. The calculator

is reset. All variables, programs, pending operations, statistical data,

answers, previous entries, and memory are cleared. To cancel the reset

operation, move the cursor to N and press [ ].

If the calculator becomes locked and pressing keys has no effect, press

[ EXP ] [ MODE ] at the same time. This unlocks the calculator and

returns all settings to their default values.

Contrast Adjustment

Press [ MODE ] and then [ ] or [ ] to make the screen lighter or

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darker.

Display Features

Graph display

Calculation display

Entry line Displays an entry of up to 76 digits. Entries with more than 11

digits will scroll to the left. When you input the 69th digit of a

single entry, the cursor changes from to to let you

know that you are approaching the entry limit. If you need to

input more than 76 digits, you should divide your calculation

into two or more parts.

Result line Displays the result of a calculation. 10 digits can be displayed,

together with a decimal point, a negative sign, the x10

indicator, and a 2-digit positive or negative exponent. Results

that exceed this limit are displayed in scientific notation.

Indicators The following indicators appear on the display to indicate the

status of the calculator.

Indicator Meaning

M Values are stored in running memory

– Result is negative

Invalid action

2nd The next action will be a 2nd function

X = Y = The x- and y-coordinates of the trace function pointer

Alphabetic keys are active

STAT Statistics mode is active

PROG Program mode is active

Angle mode: Degrees, Rads, or Grads

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SCIENG SCIentific or ENGineering display format

FIX Number of decimal places displayed is fixed

HYP Hyperbolic trig function will be calculated

The displayed value is an intermediate result

There are digits to the left or right of the display

There are earlier or later results that can be displayed.

These indicators blink while an operation or program is

executing.

Chapter 2 : Before Starting a Calculation

Changing Modes

Press [ MODE ] to display the modes menu. You can choose one of four

modes: 0 MAIN, 1 STAT, 2 BaseN, 3 PROG.

For example, to select BaseN mode:

Method 1: Press [ MODE ] and then press [ ], [ ] or [ MODE ]

until 2 BaseN is underlined; then press [ ].

Method 2: Press [ MODE ] and enter the number of the mode, [ 2 ].

Selecting an Item from a Menu

Many functions and settings are available from menus. A menu is a list of

options displayed on the screen.

For example, pressing [ MATH ] displays a menu of mathematical functions.

To select one of these functions:

1. Press [ MATH ] to display the menu.

2. Press [

] [

] [ ] to move the cursor to the function you

want to select.

3. Press [

] while the item is underlined.

With numbered menu items, you can either press [ ] while the item is

underlined, or just enter the number of the item.

To close a menu and return to the previous display, press [

CL

/

ESC

].

Key Labels

Many of the keys can perform more than one function. The labels

associated with a key indicate the available functions, and the color of a

label indicates how that function is selected.

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Label color Meaning

White Just press the key

Yellow Press [ 2nd ] and then the key

Green In Base-N mode, just press the key

Blue Press [ ALPHA ] and then the key

Using the 2nd and ALPHA keys

To execute a function with a yellow label, press [ 2nd ] and then the

corresponding key. When you press [ 2nd ], the 2nd indicator appears to

indicate that you will be selecting the second function of the next key you

press. If you press [ 2nd ] by mistake, press [ 2nd ] again to remove the

2nd indicator

Pressing [ ALPHA ] [ 2nd ] locks the calculator in 2nd function mode. This

allows consecutive input of 2nd function keys. To cancel this, press [ 2nd ]

again.

To execute a function with a blue label, press [ ALPHA ] and then the

corresponding key. When you press [ ALPHA ], the indicator appears

to indicate that you will be selecting the alphabetic function of the next key

you press. If you press [ ALPHA ] by mistake, press [ ALPHA ] again to

remove the indicator.

Pressing [ 2nd ] [ ALPHA ] locks the calculator in alphabetic mode. This

allows consecutive input of alphabetic function keys. To cancel this, press

[ ALPHA ] again.

Cursor

Press [

] or [

] to move the cursor to the left or the right. Hold down a

cursor key to move the cursor quickly.

If there are entries or results not visible on the display, press [

] or [

]

to scroll the display up or down. You can reuse or edit a previous entry

when it is on the entry line.

Press [ ALPHA ] [ ] or [ ALPHA ] [ ] to move the cursor to the

beginning or the end of the entry line. Press [ ALPHA ] [ ] or [ ALPHA ]

[ ] to move the cursor to the top or bottom of all entries.

The blinking cursor

indicates that the calculator is in insert mode.

Inserting and Deleting Characters

To insert a character, move the cursor to the appropriate position and enter

the character. The character is inserted to the immediate left of the cursor.

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To delete a character, press [

] or [

] to move the cursor to that

character and then press [ DEL ]. (When the cursor is on a character, the

character is underlined.) To undo the deletion, immediately press [ 2nd ]

[ ].

To clear all characters, press [

CL

/

ESC

]. See Example 1.

Recalling Previous Inputs and Results

Press [ ] or [ ] to display up to 252 characters of previous input, values

and commands, which can be modified and re-executed. See Example 2.

Note: Previous input is not cleared when you press [

CL

/

ESC

] or the power is

turned off` but it is cleared when you change modes.

Memory

Running memory

Press [ M+ ] to add a result to running memory. Press [ 2nd ] [ M– ] to

subtract the value from running memory. To recall the value in running

memory, press [ MRC ]. To clear running memory, press [ MRC ] twice. See

Example 4.

Standard memory variables

The calculator has 26 standard memory variables—A, B, C, D, …,

Z—which you can use to assign a value to. See Example 5. Operations

with variables include:

• [ SAVE ] + Variable assigns the current answer to the specified variable

(A, B, C, … or Z).

• [ 2nd ] [ RCL ] displays a menu of variables; select a variable to recall

its value.

• [ ALPHA ] + Variable recalls the value assigned to the specified variable.

• [ 2nd ] [ CL-VAR ] clears all variables.

Note: You can assign the same value to more than one variable in one step.

For example, to assign 98 to variables A, B, C and D, press 98

[ SAVE ] [ A ] [ ALPHA ] [ ~ ] [ ALPHA ] [ D ].

Storing an equation

Press [ SAVE ] [ PROG ] to store the current equation in memory.

Press [ PROG ] to recall the equation. See Example 6.

Array Variables

In addition to the 26 standard memory variables (see above), you can

increase memory storage by converting program steps to memory variables.

You can convert 12 program steps to one memory. A maximum of 33

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memories can be added in this way, giving you a maximum of 59 memories

(26 + 33).

Note: To restore the default memory configuration—26 memories—specify

Defm 0.

Expanded memories are named A [ 1 ] , A [ 2 ] etc and can be used in the

same way as standard memory variables. See Example 7.

Note: When using array variables, be careful to avoid overlap of memories.

The relation between memories is as follows:

Order of Operations

Each calculation is performed in the following order of precedence:

1. Functions inside parentheses, coordinate transformations, and Type B

functions, that is, those where you must press the function key before

entering the argument, for example, sin, cos, tan, sin

-1

, cos

-1

, tan

-1

, sinh,

cosh, tanh, sinh

-1

, cosh

-1

, tanh

-1

, log, ln, 10

X

, e

X

, , , NEG,

NOT, X’( ), Y ’( ), MAX, MIN, SUM, SGN, AVG, ABS, INT, Frac, Plot.

2. Type A functions, that is, those where you enter the argument before

pressing the function key, for example, x

2

, x

3

, x

-1

, x!,

º

, r, g, %,

º΄ ΄΄

,

ENGSYM.

3. Exponentiation ( ),

4. Fractions

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5. Abbreviated multiplication format involving variables, π, RAND,

RANDI.

6. ( – )

7. Abbreviated multiplication format in front of Type B functions, ,

Alog2, etc.

8. nPr, nCr

9. × ,

10. +, –

11. Relational operators: = =, < , >, ≠, ≤ , ≥

12. AND, NAND (BaseN calculations only)

13. OR, XOR, XNOR (BaseN calculations only)

14. Conversion (A b/c d/e, F D,



DMS)

When functions with the same priority are used in series, execution is

performed from right to left. For example:

e

X

ln120 → e

X

{ ln (120 ) }

Otherwise, execution is from left to right.

Compound functions are executed from right to left.

Accuracy and Capacity

Output digits: Up to 10 digits

Calculating digits: Up to 24 digits

Where possible, every calculation is displayed in up to 10 digits, or as a

10-digit mantissa together with a 2-digit exponent up to 10

±99

.

The arguments you input must be within the range of the associated function.

The following table sets out the allowable input ranges.

Functions Allowable Input range

sin x, cos x,

tan x

Deg : x ＜ 4.5 × 10

10

deg

Rad : x ＜ 2.5 × 10

8

πrad

Grad : x ＜ 5 × 10

10

grad

however, for tan x

Deg : x ≠ 90 (2n+1)

Rad : x ≠

2

π

(2n+1)

Grad : x ≠ 100 (2n+1)

(n is an integer)

sin

–1

x, cos

–1

x

x ≦ 1

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nPr, nCr

0 ≦ r ≦ n, n < 10

100

, n, r are integers.

STAT

| x | < 1

×

10

100

,| y | < 1

×

10

100

1 -VAR : n

≦

30, 2 -VAR : n

≦

30

FREQ. = n, 0

≦

n < 10

100

: n is an integer

in 1-VAR mode

σ

x,

σ

y, x, y, a, b, r : n

≠

0

Sx, Sy :n≠0,1

BaseN

DEC : - 2147483648

≦

x

≦

2147483647

BIN :

1000000000000000000000000000000

0≦x ≦

1111111111111111111111111111111

1

( for negative )

0≦x≦

0111111111111111111111111111111

1

(for zero, positive)

OCT : 20000000000≦x≦37777777777

(for negative)

0 ≦x≦17777777777 (for zero or positive)

HEX : 80000000≦x≦FFFFFFFF

(for negative)

0≦x≦7FFFFFFF (for zero or positive)

Error Conditions

When an illegal calculation is attempted or a program you enter causes an

error, an error message briefly appears and then the cursor moves to the

location of the error. See Example 3.

The following conditions will result in an error:

Message Meaning

DOMAIN Er 1. You have specified an argument that is outside the

allowable range.

2. FREQ ( in 1-VAR stats) < 0 or not an integer.

3. USL < LSL

DIVIDE BY O You attempted to divide by 0.

OVERFLOW Er The result of a calculation exceeds the limits of the

calculator.

SYNTAX Er 1. Input error.

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2. An improper argument was used in a command or

function.

3. An END statement is missing from a program.

LENGTH Er An entry exceeds 84 digits after implied multiplication

with auto-correction.

OUT OF SPEC You input a negative C

PU

or C

PL

value, where

σ3

x–USL

=C

PU

and

σ3

LSL–x

=C

PL

NEST Er Subroutine nesting exceeds 3 levels.

GOTO Er There is no corresponding Lbl n for a GOTO n.

GOSUB Er 1. There is no corresponding PROG n for a GOSUB PROG

n.

2. Attempt to jump to a program area in which there is no

program stored.

EQN SAVE Er Attempt to save an equation to a program area that

already has a stored program.

EMPTY Er Attempt to run a program from an area without an

equation or program.

MEMORY Er 1. Memory expansion exceeds the steps remaining in the

program.

2. Attempt to use a memory when no memory has been

expanded.

DUPLICATE The label name is already in use.

LABEL

Press [

CL

/

ESC

] to clear an error message.

Chapter 3 : Basic Calculations

Arithmetic Calculation

• For mixed arithmetic operations, multiplication and division have

priority over addition and subtraction. See Example 8.

• For negative values, press [ (–) ] before entering the value. See

Example 9.

• Results greater than 10

10

or less than 10

-9

are displayed in exponential

form. See Example 10.

Display Format

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• A decimal format is selected by pressing [ 2nd ] [ FIX ] and selecting a

value from the menu (F0123456789). To set the displayed decimal

places to n, enter a value for n directly, or press the cursor keys until

the value is underlined and then press [ ]. (The default setting is

floating point notation (F) and its n value is •). See Example 11.

• Number display formats are selected by pressing [ 2nd ] [ SCI/ENG ]

and choosing a format from the menu. The items on the menu are FLO

(for floating point), SCI (for scientific), and ENG (for engineering). Press

[ ] or [ ] until the desired format is underlined, and then press

[ ]. See Example 12.

• You can enter a number in mantissa and exponent format using the

[ EXP ] key. See Example 13.

• This calculator also provides 11 symbols for input of values using

engineering notation. Press [ 2nd ] [ ENG SYM ] to display the symbols.

See Example 14.

The symbols are listed below:

Parentheses Calculations

• Operations inside parentheses are always executed first. Up to 13

levels of consecutive parentheses are allowed in a single calculation.

See Example 15.

• Closing parentheses that would ordinarily be entered immediately prior

to pressing [ ] may be omitted. See Example 16.

Percentage Calculations

[ 2nd ] [ % ] divides the number in the display by 100. You can use this

function to calculate percentages, mark-ups, discounts, and percentage

ratios. See Example 17.

Repeat Calculations

You can repeat the last operation you executed by pressing [ ]. Even if

a calculation concluded with the [ ] key, the result obtained can be

used in a further calculation. See Example 18.

Answer Function

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When you enter a numeric value or numeric expression and press [ ],

the result is stored in the Answer function, which you can then quickly recall.

See Example 19.

Note: The result is retained even if the power is turned off. It is also retained

if a subsequent calculation results in an error.

Chapter 4 : Common Math Calculations

Logarithm and Antilogarithm

You can calculate common and natural logarithms and antilogarithms using

[ log ], [ ln ], [ 2nd ] [ 10

x

], and [ 2nd ] [ e

x

]. See Example 20.

Fraction Calculation

Fractions are displayed as follows:

5

┘

12 =

56 U 5

┘

12 =

• To enter a mixed number, enter the integer part, press [ A b/c ], enter

the numerator, press [ A b/c ], and enter the denominator. To enter an

improper fraction, enter the numerator, press [ A b/c ], and enter the

denominator. See Example 21.

• During a calculation involving fractions, a fraction is reduced to its

lowest terms where possible. This occurs when you press [ + ], [ – ],

[ × ], [ ] ) or [ ]. Pressing [ 2nd ] [ A b/c d/e ] converts a

mixed number to an improper fraction and vice versa. See Example

22.

• To convert a decimal to a fraction or vice versa, press [ 2nd ]

[ F D ] and [ ]. See Example 23.

• Calculations containing both fractions and decimals are calculated in

decimal format. See Example 24.

Converting Angular Units

You can specify an angular unit of degrees (DEG), radians (RAD), or grads

(GRAD). You can also convert a value expressed in one angular unit to its

corresponding value in another angular unit.

The relation between the anglular units is :

180° = π radians = 200 grads

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To change the angular unit setting to another setting, press

[ DRG ] repeatedly until the angular unit you want is indicated on the

display.

The conversion procedure follows (also see Example 25):

1. Change the angle units to the units you want to convert to.

2. Enter the value of the unit to convert.

3. Press [ 2nd ] [ DMS ] to display the menu. The units you can select are

°(degrees), ’ (minutes), ” (seconds), r (radians), g (gradians) or



DMS

(Degrees-Minutes-Seconds).

4. Select the units you are converting from.

5. Press [ ] twice.

To convert an angle to DMS notation, select



DMS. An example of DMS

notation is 1° 30’ 0” (= 1 degrees, 30 minutes, 0 seconds). See Example

26.

To convert from DMS notation to decimal notation, select

°(degrees), ’(minutes), ”(seconds). See Example 27.

Trigonometric and Inverse Trigonometric functions

The calculator provides standard trigonometric functions and inverse

trigonometric functions: sin, cos, tan, sin

-1

, cos

-1

and tan

-1

. See Example 28.

Note: Before undertaking a trigonometric or inverse trigonometric

calculation, make sure that the appropriate angular unit is set.

Hyperbolic and Inverse Hyperbolic functions

The [ 2nd ] [ HYP ] keys are used to initiate hyperbolic and inverse

hyperbolic calculations using sinh, cosh, tanh, sinh

-1

, cosh

-1

and tanh

-1

. See

Example 29.

Note: Before undertaking a hyperbolic or inverse hyperbolic calculation,

make sure that the appropriate angular unit is set.

Coordinate Transformations

Press [ 2nd ] [ R P ] to display a menu to convert rectangular coordinates

to polar coordinates or vice versa. See Example 30.

Note: Before undertaking a coordinate transformation, make sure that the

appropriate angular unit is set.

Mathematical Functions

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Press [ MATH ] repeatedly to is display a list of mathematical functions and

their associated arguments. See Example 31. The functions available are:

! Calculate the factorial of a specified positive integer n , where

n

≦

69.

RAND Generate a random number between 0 and 1.

RANDI Generate a random integer between two specified integers, A

and B, where A

≦

random value

≦

B.

RND Round off the result.

MAX Determine the maximum of given numbers. (Up to 10 numbers

can be specified.)

MIN Determine the minimum of given numbers. (Up to 10 numbers

can be specified.)

SUM Determine the sum of given numbers. (Up to 10 numbers can

be specified.)

AVG Determine the average of given numbers. (Up to 10 numbers

can be specified.)

Frac Determine the fractional part of a given number.

INT Determine the integer part of a given number.

SGN Indicate the sign of a given number: if the number is

negative, –1 is displayed; if zero, 0 is displayed; if positive, 1

is displayed.

ABS Display the absolute value of a given number.

nPr Calculate the number of possible permutations of n items taken

r at a time.

nCr Calculate the number of possible combinations of n items

taken r at a time.

Defm Memory expansion.

Other Functions ( x

-1

, , , ,x

2

, x

3

,

^

)

The calculator also provides reciprocal ( [ x

-1

] ), square root ( [ ] ), cube

root ( [ ] ), square ( [ x

2

] ), universal root ( [ ] ), cubic ( [ x

3

] ) and

exponentiation ( [

^

] ) functions. See Example 32.

Unit Conversion

You can convert numbers from metric to imperial units and vice versa. See

Example 33. The procedure is:

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1. Enter the number you want to convert.

2. Press [ 2nd ] [ CONV ] to display the units menu. There are 7 menus,

covering distance, area, temperature, capacity, weight, energy, and

pressure.

3. Press [

] or [ ] to scroll through the list of units until the

appropriate units menu is shown, then press [ ] .

4. Press [ ] or [

] to convert the number to the highlighted unit.

Physics Constants

You can use the following physics constants in your calculations:

Symbol Meaning Value

c Speed of light 299792458 m / s

g Acceleration of gravity 9.80665 m.s

-2

G Gravitational constant 6.6725985

×

10

-11

m

3

kg

-1

s

-2

Vm Molar volume of ideal gas 0.0224141 m

3

mol

-1

NA Avogadro’s number 6.022136736

×

10

23

mol

-1

e Elementary charge 1.602177335

×

10

-19

C

m

e

Electron mass 9.109389754

×

10

-31

kg

m

p

Proton mass 1.67262311

×

10

-27

kg

h Planck’s constant 6.62607554

×

10

-34

J.S

k Boltzmann’s constant 1.38065812

×

10

-23

J.K

-1

IR Gas constant 8.3145107 J / mol • k

IF Faraday constant 96485.30929 C / mol

mn Neutron constant 1.67492861

×

10

-27

kg

µ

Atomic mass constant 1.66054021

×

10

-27

kg

ε

0

Dielectric permittivity 8.854187818

×

10

-12

F / m

µ

0

Magnetic permittivity 1.256637061

×

10

-6

N A

-2

φ

0

Flux quantum 2.067834616

×

10

-15

Wb

a

0

Bohr radius 5.291772492

×

10

-11

m

µ

B Bohr magneton 9.274015431

×

10

-24

J / T

µ

N Nuclear magneton 5.050786617

×

10

-27

J / T

All physical constants in this manual are based on the 1986 CODATA

recommended values of the fundamental physical constants.

To insert a constant:

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1. Position your cursor where you want the constant inserted.

2. Press [ 2nd ] [ CONST ] to display the physics constants menu.

3. Scroll through the menu until the constant you want is underlined.

4. Press [ ]. (See Example 34.)

Multi-statement functions

Multi-statement functions are formed by connecting a number of individual

statements for sequential execution. You can use multi-statements in manual

calculations and in the program calculations.

When execution reaches the end of a statement that is followed by the

display result command symbol ( ), execution stops and the result up to

that point appears on the display. You can resume execution by pressing

[ ]. See Example 35.

Chapter 5 : Graphs

Built-in Function Graphs

You can produce graphs of the following functions: sin, cos, tan, sin

-1

, cos

-1

,

tan

-1

, sinh, cosh, tanh, sinh

-1

, cosh

-1

, tanh

-1

, , , x

2

, x

3

, log, ln, 10

x

, e

x

, x

–1

.

When you generate a built-in graph, any previously generated graph is

cleared. The display range is automatically set to the optimum. See Example

36.

User-generated Graphs

You can also specify your own single-variable functions to graph (for

example, y = x

3

+ 3x

2

– 6x – 8). Unlike built-in functions (see above), you

must set the display range when creating a user generated graph.

Press the [ Range ] key to access the

range parameters for each axis:

minimum value, maximum value, and

scale (that is, the distance between

the tick marks along an axis).

E-20

After setting the range, press [ Graph ] and enter the expression to be

graphed. See Example 37.

Graph

↔

Text Display and Clearing a Graph

Press [ G T ] to switch between graph display and text display and vice

versa.

To clear the graph, please press [ 2nd ] [ CLS ].

Zoom Function

The zoom function lets you enlarge or reduce the graph. Press [ 2nd ]

[ Zoom x f ] to specify the factor for enlarging the graph, or press [ 2nd ]

[ Zoom x 1/f ] to specify the factor for reducing the graph. To return the

graph to its original size, press [ 2nd ] [ Zoom Org ]. See Example 37.

Superimposing Graphs

• A graph can be superimposed over one or more graphs. This makes it

easy to determine intersection points and solutions that satisfy all the

corresponding expressions. See Example 38.

• Be sure to input variable X in the expression for the graph you want to

superimpose over a built-in graph. If variable X is not included in the

second expression, the first graph is cleared before the second graph is

generated. See Example 39.

Trace Function

E-21

This function lets you move a pointer around a graph by pressing [

] and

[

]. The x- and y-coordinates of the current pointer location are displayed

on the screen. This function is useful for determining the intersection of

superimposed graphs (by pressing [ 2nd ] [ X Y ]). See Example 40.

Note: Due to the limited resolution of the display, the position of the pointer

may be an approximation.

Scrolling Graphs

After generating a graph, you can scroll it on the display. Press [

] [ ]

[ ] [

] to scroll the graph left, right, up or down respectively. See

Example 41.

Plot and Line Function

The plot function is used to mark a point on the screen of a graph display.

The point can be moved left, right, up, or down using the cursor keys. The

coordinates of the point are displayed.

When the pointer is at the desired location, press [ 2nd ] [ PLOT ] to plot a

point. The point blinks at the plotted location.

Two points can be connected by a straight line by pressing [ 2nd ] [ LINE ].

See Example 42.

Chapter 6 : Statistical Calculations

The statistics menu has four options: 1-VAR (for analyzing data in a single

dataset), 2-VAR (for analyzing paired data from two datasets), REG (for

performing regression calculations), and D-CL (for clearing all datasets).

Single-Variable and Two-Variable Statistics

1. From the statistics menu, choose 1-VAR or 2-VAR and press [ ].

2. Press [ DATA ], select DATA-INPUT from the menu and press [ ].

3. Enter an x value and press [

].

4. Enter the frequency ( FREQ ) of the x value (in 1-VAR mode) or the

corresponding y value ( in 2-VAR mode ) and press [

].

5. To enter more data, repeat from step 3.

6. Press [ 2nd ] [ STATVAR ].

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